"Stitches" is a song recorded by Canadian singer Shawn Mendes for his debut studio album, Handwritten (2015). It was initially released to iTunes via Island Records on March 16, 2015 as the third pre-order exclusive track and was subsequently serviced to radio via Republic Records on May 5, 2015 as the album's third official single. "Stitches" is the first song by Mendes to appear on a Billboard airplay chart, debuting at number 36 on the Mainstream Top 40 chart in June 2015, and eventually reaching number one. It became his first top 10 single on the Billboard Hot 100, charting at number four. "Stitches" also reached the top 10 on the Canadian Hot 100.

It was nominated for Choice Music Single: Male Artist at the 2015 Teen Choice Awards.

In the United States, the song debuted at number 14 on the Billboard Bubbling Under Hot 100 Singles on the chart dated April 25, 2015. It rose to number two on the Bubbling Under chart for the week of June 6, 2015 before debuting on the Billboard Hot 100 proper at number 89 for the chart dated June 13, 2015. On the week ending August 27, 2015, the song entered the top 40 at number thirty-five, climbed seven positions from number 42. The song jumped 12 spots to enter the top 20 at number twenty for the week ending September 10, 2015. The song entered the top 10 at number nine for the chart dated October 17, 2015 and climbed to number eight on the following week. On the week ending October 31, 2015, it entered the top 5 at number four, becoming Mendes' highest peaking song on the chart, as well as his first top 5 hit. "Stitches" debuted at number thirty-six on the Billboard Mainstream Top 40 chart for the week ending June 20, 2015, becoming his first US airplay hit. It has since peaked at number 1 on the chart, becoming his first #1 hit. As of November 2015, it has sold 1.3 million copies and has been certified platinum by the Recording Industry Association of America (RIAA).